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POCan't figure out why button is disabled after adding a command
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  1. POCan't figure out why button is disabled after adding a command
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    copied!<p>Edit: Here is the xaml for the window containing the command bindings.</p> <pre><code>&lt;dx:DXWindow x:Class="Client.App.Support.AskAQuestionDialog" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core" xmlns:libRes="clr-namespace:Shared.Lib.Resources;assembly=Shared.Lib" xmlns:support="clr-namespace:Client.App.Support" Title="{x:Static libRes:Strings.AskAQuestion}" Loaded="DXWindow_Loaded" Height="260" Width="600"&gt; &lt;Window.CommandBindings&gt; &lt;CommandBinding Command="support:AskAQuestionDialog.ListToSendCommand" Executed="MainWindowCommandBinding_Executed" CanExecute="CommandBinding_CanExecute"/&gt; &lt;/Window.CommandBindings&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition /&gt; &lt;RowDefinition Height="Auto"/&gt; &lt;/Grid.RowDefinitions&gt; &lt;StackPanel Grid.Row="0" Orientation="Vertical"&gt; &lt;TextBlock Style="{StaticResource DatailsHeaderTextStyle}" Margin="4,4,4,4" Text="{x:Static libRes:Strings.Subject}"/&gt; &lt;TextBox Name="_subjectTextBox" AcceptsReturn="False" TextChanged="_subjectTextBox_TextChanged" Margin="2" MaxLines="1" TextWrapping="NoWrap"/&gt; &lt;TextBlock Style="{StaticResource DatailsHeaderTextStyle}" Margin="4,4,4,4" Text="{x:Static libRes:Strings.Description}"/&gt; &lt;TextBox VerticalAlignment="Stretch" Name="_descriptionTextBox" VerticalScrollBarVisibility="Auto" TextWrapping="WrapWithOverflow" AcceptsReturn="True" TextChanged="_descriptionTextBox_TextChanged"/&gt; &lt;/StackPanel&gt; &lt;StackPanel Grid.Row="1" Orientation="Horizontal" VerticalAlignment="Bottom" HorizontalAlignment="Right"&gt; &lt;StackPanel.Resources&gt; &lt;Style TargetType="Button" BasedOn="{StaticResource {x:Type Button}}"&gt; &lt;Setter Property="Width" Value="80"/&gt; &lt;Setter Property="Margin" Value="2"/&gt; &lt;/Style&gt; &lt;/StackPanel.Resources&gt; &lt;Button Name="Attach" Content="Attach Screen Shots" Click="Attach_Click" Width="140" HorizontalAlignment="Right"/&gt; &lt;Button Content="{x:Static libRes:Strings.Submit}" Click="Submit_Click" Margin="10,0,0,0"/&gt; &lt;Button Content="{x:Static libRes:Strings.Close}" Click="Close_Click" Margin="10,0,0,0"/&gt; &lt;Grid&gt; &lt;ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled"&gt; &lt;ItemsControl Name="_itemsControl" ItemsSource="{Binding ''}"&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;WrapPanel Orientation="Horizontal"/&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Image Name ="_thumbnailImage" HorizontalAlignment="Left" VerticalAlignment="Center" Source="{Binding ''}"/&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; &lt;/ScrollViewer&gt; &lt;/Grid&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>And the relevant code behind:</p> <pre><code>private void MainWindowCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { if (e.Command == ListToSendCommand) { this._itemsControl.ItemsSource = (List&lt;BitmapSource&gt;)e.Parameter; } } </code></pre> <p>I've been learning about <code>RoutedCommands</code> in WPF and I ran into a problem after adding a command to a button. In my window, <code>SelectScreenShots</code>, I have a single <code>CommandBinding</code> that is handled in the code behind.</p> <p>I have another window, <code>AskAQuestionDialog</code>, with another command binding that is handled in its code behind.</p> <p>In <code>SelectScreenShots</code> I added the command that is handled in <code>AskAQuestion</code> to a button and now the button is constantly disabled. Before when I was just using a click event, it worked fine.</p> <p>Why is the button now disabled?</p> <p>Here is the xaml. The command I added is <code>ListToSendCommand</code> on the button <code>_OK_Button</code>.</p> <pre><code>&lt;dxc:DXWindow x:Class="Client.App.Support.SelectScreenShots" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/core" Focusable="False" IsTabStop="False" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core" xmlns:libRes="clr-namespace:Shared.Lib.Resources;assembly=Shared.Lib" xmlns:support="clr-namespace:Client.App.Support" Title="Select Images" Height="600" Width="800"&gt; &lt;Window.CommandBindings&gt; &lt;CommandBinding Command="support:SelectScreenShots.SelectImageCommand" Executed="MainWindowCommandBinding_Executed"/&gt; &lt;/Window.CommandBindings&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="367"/&gt; &lt;RowDefinition Height="167"/&gt; &lt;RowDefinition Height="33"/&gt; &lt;/Grid.RowDefinitions&gt; &lt;ContentPresenter Grid.Row="0" Name="_contentPresenter" Content="{Binding ''}"/&gt; &lt;ContentPresenter Grid.Row="1" Name="_contentPresenter2" Content="{Binding ''}"/&gt; &lt;StackPanel Grid.Row="2" HorizontalAlignment="Right" Orientation="Horizontal"&gt; &lt;Button Name="_OK_Button" Content="OK" Margin="0,5,5,5" Width="75" Height="23" Command="{x:Static support:AskAQuestionDialog.ListToSendCommand}" CommandParameter="{Binding ''}" IsEnabled="True"/&gt; &lt;Button Name="_Cancel_Button" Content="Cancel" Click="_Cancel_Button_Click" Margin="0,5,5,5" Width="75" Height="23"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre> <p></p>
 

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